Macrophages are key immune cells that constantly identify and remove emerging cancers. Unfortunately, some cancer cells slip under the macrophage radar. When these immuno-escaped cancer cells develop the ability to control macrophages, cancers can become enabled to metastasise. However, this reliance on macrophages could provide therapeutic opportunities.
Last week, two groups reported encouraging clinical trial results of iPSC-based autologous cellular therapy for Parkinsons disease (PD). However, the implanted cells' poor survival may have undermined these results.
Immunotherapy, boosting the activity of the immune system, is widely used in cancer treatment. Success has been achieved with a variety of modalities, including adoptive cellular immunotherapy, antibodies, tumour vaccines, and small-molecule inhibitors. Tumour-associated macrophages (TAMs) play a key role in treatment outcome for many of these modalities even if the treatment does not target them directly.
Cells communicate by their secretions, impacting the behaviour of other cells. Cell secretion therapies use living cells to produce and secrete therapeutic substances that can aid in treating diseases. These include extracellular vesicles (EVs), cytokines, chemokines and hormones. Such therapies are at the forefront of regenerative medicine and immunotherapy.
In biomanufacturing, growth factors and cytokines are crucial for the cultivation and maintenance of cell cultures, particularly in the production of therapeutic proteins, vaccines, and other biologics. Just a few growth factors are widely used.
Chemokines are promising modalities in the treatment of disease. These small signaling proteins, primarily known for their role in directing the movement of immune cells, are now being explored for their therapeutic potential in a range of conditions, from cancer to chronic inflammatory diseases.
Creating a chemokine or growth factor concentration gradient is a crucial lab technique for studying cell migration, particularly in neuroscience, immunology and cancer research. Sustained release growth factors can simplify chemotaxis studies.
As well as causing the proliferation of cells, growth factors can promote differentiation and even the death of cells. For example, the differentiation of neuronal progenitor cells to functional neuronal cells is regulated by so-called neurotrophic growth factors. As with the proliferative growth factors, neurotrophic growth factors initiate a complex cascade of events by binding to receptor proteins that span the cell surface:
Growth factors are crucial proteins in regulating various cellular processes, including differentiation and cell division. Simulation of cell division is triggered when particular growth factors bind cell receptors. This triggers a cascade of events through a series of steps that result in mitosis and cell division.
Most growth factors produce a sigmoidal dose response curve. However, biphasic responses can also be generated, even from a single receptor. The specific reasons underlying a biphasic dose response caused by FGF-2 biding to FGFR1 have been elucidated.
